A read on a closed pane's event ends ENOENT, and the pane cap is ENOSPC

9ns reads an error's words, not its errno: "window shut down" came out as
EIO where every other file of a gone pane gives ENOENT, and "no pane
slots" as EIO. The event and pty/data reads a pane closed under now say
"no such pane: its window shut" (ENOENT), and the cap says "no space for
a pane: 64 max" (ENOSPC; 9ns has no word for ENFILE).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ninep/events.zig b/src/ninep/events.zig
index 61aadae2..c54d8454 100644
--- a/src/ninep/events.zig
+++ b/src/ninep/events.zig
@@ -765,7 +765,7 @@ test "a pane deleted while its event file is open leaves no suppression behind"
     try testing.expectEqual(@as(u16, 0), p.fs.listeners);
     // The reader's next read hears what acme says of a window gone under it.
     const shut = call(p, .{ .tag = 19, .op = .read, .node = event, .handle = a.reply.handle, .size = 64 });
-    try testing.expectEqual(E.IO, shut.errno());
+    try testing.expectEqual(E.NOENT, shut.errno());
     try testing.expectEqualStrings(tree.e_shut_down, shut.reply.ename);
 
     _ = call(p, .{ .tag = 20, .op = .release, .node = event, .handle = a.reply.handle });